商品描述

Description

System administrators need to stay ahead of new security
vulnerabilities that leave their networks exposed every day. A firewall and an
intrusion detection systems (IDS) are two important weapons in that fight,
enabling you to proactively deny access and monitor network traffic for signs
of an attack.

Linux Firewalls discusses the technical details of the
iptables firewall and the Netfilter framework that are built into the Linux
kernel, and it explains how they provide strong filtering, Network Address
Translation (NAT), state tracking, and application layer inspection
capabilities that rival many commercial tools. You'll learn how to deploy
iptables as an IDS with psad and fwsnort and how to build a strong, passive
authentication layer around iptables with fwknop.

Concrete examples illustrate concepts such as firewall
log analysis and policies, passive network authentication and authorization,
exploit packet traces, Snort ruleset emulation, and more with coverage of
these topics:

Perl and C code snippets offer practical examples that
will help you to maximize your deployment of Linux firewalls. If you're
responsible for keeping a network secure, you'll find Linux Firewalls
invaluable in your attempt to understand attacks and use iptables—along with
psad and fwsnort—to detect and even prevent
compromises.